About Lesson
- Growth is, a quantitative term, an irreversible increase in number, volume (size) or weight of cell, tissue or organ in plant life cycle.
- It involves
Cell division in meristems, by increasing cell number, increases the potential for growth.
- However, it is cell expansion that accounts for the actual increase in plant mass.
- Together, these processes contribute to plant form.
Exceptions ： seedling dry weight less than the seed during germination. Megaspore formation（ 4→1）
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